package org.example.tool;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class DateUtils {


    /**
     * @param args
     * @throws ParseException
     */
    public static void main(String[] args) throws ParseException {
//        LocalDateTime parse = LocalDateTime.parse("2024-03-25 23:07:14.767", DateTimeFormatter.ofPattern("yyyy-MM-
        Date date = DateUtils.strToDateTime("2024-01-01 00:00:00");
        System.out.println(date.getTime());
//        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
//        Date d1 = sdf.parse("2012-09-08 10:10:10");
//        Date d2 = sdf.parse("2012-09-15 00:00:00");
//        System.out.println(daysBetween(d1, d2));
//
//        System.out.println(daysBetween("2012-09-08 10:10:10", "2012-09-15 00:00:00"));
    }

    /**
     * 计算两个日期之间相差的天数
     *
     * @param smdate 较小的时间
     * @param bdate  较大的时间
     * @return 相差天数
     * @throws ParseException
     */
    public static int daysBetween(Date smdate, Date bdate) {
        try {
            if (smdate == null || bdate == null) {
                return 0;
            }
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            smdate = sdf.parse(sdf.format(smdate));
            bdate = sdf.parse(sdf.format(bdate));
            Calendar cal = Calendar.getInstance();
            cal.setTime(smdate);
            long time1 = cal.getTimeInMillis();
            cal.setTime(bdate);
            long time2 = cal.getTimeInMillis();
            long between_days = (time2 - time1) / (1000 * 3600 * 24);
            between_days += 1;

            return Integer.parseInt(String.valueOf(between_days));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return 0;
    }

    /**
     * 　　 *字符串的日期格式的计算
     */
    public static int daysBetween(String smdate, String bdate) throws ParseException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Calendar cal = Calendar.getInstance();
        cal.setTime(sdf.parse(smdate));
        long time1 = cal.getTimeInMillis();
        cal.setTime(sdf.parse(bdate));
        long time2 = cal.getTimeInMillis();
        long between_days = (time2 - time1) / (1000 * 3600 * 24);

        return Integer.parseInt(String.valueOf(between_days));
    }

    public static String dateFormat(Date date) {
        if (date == null) {
            return "";
        }

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
        return sdf.format(date);
    }

    /**
     * @param str
     * @return 字符串转日期类型yyyy-MM-dd HH:mm:ss
     */
    public static Date strToDateTime(String str) {
        Date date = null;
        if (str != null) {
            SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            try {
                date = df.parse(str);
            } catch (ParseException e) {
                // log.error("DateParse Error!");
            }
        }
        return date;
    }
}
